Split-shed mechanism for looms.



PATENTBD NOV. 8, 1904.

r H. P. WIRZ. SPLIT SHED MECHANISM FOR LOOMS.

APPLIOATION FILED JUNE 18.1904.

NO noun.

UNITED STATES Patented November 8, 1904,

HENRY P. WIRZ, OF PATERSON, NEW

JERSEY, ASSIGNOR TO SOHAUM AND UHLINGER, OF PHILADELPHIA, PENNSYLVANIA,A FIRM.

SPLIT-SHED MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 774,225, dated November8, 1904.

Application filed June 18, 1904. Serial No. 213,059. (No model.)

To all whom it may concern.-

Be it known that I, HENRY P. VVIRZ, a citizen i of the United States,residing at 696 River street, Paterson, county of Passaic, State of NewJersey, have invented certain new and useful Improvements in Split-ShedMechanism for Looms, of which the following is a specification.

My invention relates to shedding mechanism for looms, and particularlyto improved means for producing what is termed the split-shed effect inthe operation of the harness. This consists in causingthe passing of thewarp-threads consecutively instead of simultaneously, and has heretoforebeen effected by employing a series of cams set one ahead of another soas to operate the harnessoperating levers in succession, as desired.

My improvements are illustrated in the accompanying drawings as appliedto the double-lift open-shed mechanism fully shown in Patent N 0.103,565, granted May 21, 1889, to \V. P. Uhlinger, and are particularlydescribed in connection therewith and the novel features specificallypointed out in the claims.

Figure 1 is a diagrammatic View indicating the position of the severalparts of the said mechanism when the griff engaging hooks are fullyretracted and the harness lowered, the hooks and engaging grilf,however, being also indicated in projected position by dotted lines.Fig. 2 is a fragmentary plan view indicating the hooks and engaginggriff both in the retracted and projected positions of Fig. 1.

The harness-operating levers 2, pivoted upon the fixed rod 3 of theframe, are each formed with a series of notches 4in the outer portionthereof, to which the several harnessoperating cords 5 are connected atrequired distances from the fulcrumrod 3. In the preferred double liftmechanism indicated these levers 2 are operated through the medium ofrocking levers 6, connected to the levers 2 by middle links 7 and togriif-engaging hooks 8 by end links 9, the latter being guided, asusual, in fixed bars 10, against which their shouldered forward ends 11stop when the hooks 8 are in their normal retracted position with theconnected harness lowered. The griifs or knives 12 are carried bysuitably-guided .grilf-frames, to which reverse reciprocating movementsare imparted as usual,and the engagement or disengagement of the hooks 8with the reciprocated griffs is determined by the hook-lifting needles13, as indicated by the pattern carried upon the card-cylinders 13, allas more fully illustrated and described in the patent previouslyreferred to, in connection with which my present improvements may bereadily applied, as will now be pointed out.

In order to secure the split-shed effect, it is required, in the firstplace, that the warpthreads shall be made to pass each otherconsecutively instead of simultaneously, so that the crowding whichordinarily results in forming the shed may be prevented, and, in thesecond place, that the ultimate lift of the threads shall beapproximately equal. These results I attain in the preferredconstruction shown by forming the hooks 8 of different lengths, so thatwhen retracted by the falling of the harness-frames until stopped bycontact of the link-heads 11 with the fixed guidebars the outer ends 15of the hooks will not be parallel with'the edge of the grid, but willextend to different distances beyond the latter, so that the grid in itssucceeding forward movement will engage the hooks indicated by thepattern-controlled needles 13 not simultaneously, but in desiredsuccession, with the result that the connected warps are similarly movedin succession, so that the passings thereof will be atslightly-different times. The connection of the harness-operating cords5 to the notched levers 2 is varied to correspond with the lengths ofthe respective hooks, so as to change the leverage, and

thus hasten the lift of the last-passedwarps sufficiently to effect theapproximately equal lift of all the indicated threads.

What I claim is- 1. A split-shed mechanism for looms comprising a seriesof harness-operating levers, a reciprocating griff-frame,pattern-controlled needles, and a series of hooks engaged by saidneedles and operatively connected to said levers substantially asdescribed, the griff-engaging ends of said hooks when in retractedpositions being at different distances from the retracted gritf edgewhereby the forward movement of the latter operates the indicated leversconsecutively.

2. A split-shed mechanism for looms comprising a series ofharness-operating levers, a reciprocating griff-frame,pattern-controlled needles, and a series of hooks engaged by saidneedles and operatively connected to said levers substantially asdescribed, the grifi-engaging ends of said hooks when in retractedposition being at different distances from the retracted grifi' edge andthe harness connectioris to said levers being correspondingly vanet.

3. The combination with the harness-operating levers, and the rockinglevers connected thereto and carrying suitably-guided links, of hooks ofdifferent lengths connected to said links, and reciprocating griffs andpatterncontrolled needles for said hooks substantially as set forth.

In testimony whereofI affix my signature in the presence of twowitnesses.

HENRY P. VVIRZ.

Witnesses:

RUNo GROSSKWITH, WALTER WINTERS.

